This Friday marks 25 years since the September 11, 2001 terrorist attacks, a day that forever changed the United States.
Communities across the country will observe the anniversary with memorial ceremonies, national broadcasts, and volunteer service projects honoring the nearly 3,000 people who were killed.
The day will also recognize the thousands of people who were injured, along with first responders, recovery workers, and members of the military whose lives were forever changed in the aftermath of the attacks.
September 11 is also observed as a National Day of Service and Remembrance, encouraging Americans to honor those lost by volunteering and helping their communities.
This year's milestone carries additional meaning because an entire generation has now grown up without firsthand memories of 9/11. Schools, museums, and memorial organizations are focusing on teaching younger Americans what happened that day and why its impact continues to be felt today.
For those who remember September 11, 2001, it may be hard to believe that a quarter century has passed.
Friday will be a time to remember the victims, honor the heroes, and reflect on a moment in history that continues to shape America.